OT: My tow rig failed emissions! |
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OT: My tow rig failed emissions! |
Eddie914 |
Aug 9 2005, 02:30 PM
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#1
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Unregistered |
My tow rig failed emissions today in Seattle!
1983 Chevy 454 with a Quadra jet pushing a 27 ft motorhome chassis. It failed the Carbon Monoxide at idle test. HYDROCARBON (ppm) Cruise Limit: 220 Cruise Emissions: 33 Idle Limit: 220 Idle Emissions: 128 CARBON MONOXIDE (%) Cruise Limit: 1.2% Cruise Emissions: 0.75% Idle Limit: 1.2% Idle Emissions: 4.78% Unfortunately the idle mixture screws are sealed on this carburetor (for the time being). The air pump has been removed. What is interesting is that since I replaced the heads to rectify the badly worn valve seats the HC has gone substantially down and the CO has gone substantially down. Are the HC and CO inversely proportional? Should I lean it out? Should I richen it up? … or should I just shoot it? Thanks Eddie |
messix |
Aug 10 2005, 12:49 PM
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#2
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
get a carb rebuild kit and replace the float. q-jets are bad for having the float saturate and get heavy which causes high fuel levels in the float bowl, this causes rich idle condition.
hope this helps |
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